21f+3=2(6f-3)+18

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Solution for 21f+3=2(6f-3)+18 equation:


Simplifying
21f + 3 = 2(6f + -3) + 18

Reorder the terms:
3 + 21f = 2(6f + -3) + 18

Reorder the terms:
3 + 21f = 2(-3 + 6f) + 18
3 + 21f = (-3 * 2 + 6f * 2) + 18
3 + 21f = (-6 + 12f) + 18

Reorder the terms:
3 + 21f = -6 + 18 + 12f

Combine like terms: -6 + 18 = 12
3 + 21f = 12 + 12f

Solving
3 + 21f = 12 + 12f

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Add '-12f' to each side of the equation.
3 + 21f + -12f = 12 + 12f + -12f

Combine like terms: 21f + -12f = 9f
3 + 9f = 12 + 12f + -12f

Combine like terms: 12f + -12f = 0
3 + 9f = 12 + 0
3 + 9f = 12

Add '-3' to each side of the equation.
3 + -3 + 9f = 12 + -3

Combine like terms: 3 + -3 = 0
0 + 9f = 12 + -3
9f = 12 + -3

Combine like terms: 12 + -3 = 9
9f = 9

Divide each side by '9'.
f = 1

Simplifying
f = 1

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